/*
 * TextServices / TSDotNet / TSNative
 * Marco Maria Bellocchi, Mauro Bampo
 * Copyright(c) 2013.
 * 
 * The MIT License
 * 
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 * 
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 * 
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 * 
 */

// MB 25/01/2013: Created

#include "stdafx.h"
#include "CharFilterBase.h"

using namespace TSNative::Filters;

int CharFilterBase::GetInitialBufferLength(int nInputLength) {
	return nInputLength;
}

FilterState CharFilterBase::Process(const char* pInput, int inputLength, char** ppBuffer, int bufferLength, FilterState inputState) {
	FilterState outputState;
	outputState.InputIndex = inputState.InputIndex;
	int ii = inputState.InputIndex;
	int io = inputState.OutputIndex;
	char cIn = pInput[ii];
	for(; ii<inputLength && io<bufferLength && cIn != '\0'; ii++, io++) {
		cIn = pInput[ii];
		int cOut = cIn;
		if(cIn != '\0') {
			cOut = ProcessChar(cIn, pInput, ii, inputLength);
#if _DEBUG
			if(cOut == '\0')
				throw exception("Terminator generated. This is like to produce an invalid string.");
#endif
		}
		(*ppBuffer)[io] = (char)cOut;
	}
	if(io >= bufferLength && ii < inputLength && cIn != '\0')
		outputState.Overflow = true;
	if(io < bufferLength)
		(*ppBuffer)[io++] = '\0';
	outputState.InputIndex = ii-1;
	outputState.OutputIndex = io-1;
	return outputState;
}